- Air_______ is one of the biggest problems in the world today
- Yes. We must take action to make the air less_______.
| A．pollution; pollution | B．pollute; pollution |
| C．pollution; pollute | D．pollution; polluted |
- What do you think of this film?
- Great! I_______ such a wonderful film before.
| A．don't see | B．won't see | C．have never seen | D．have already seen |
My uncle______ a farmer. Now he is a driver.
| A．is used to | B．is used to be | C．used to being | D．used to be |
________the end of the story, the main character______.
| A．In, dead | B．At, was die | C．To, was dead | D．At, died |
My parents_______ twenty years ago. They _____for twenty years.
| A．have been married, got married | B．were married, got married |
| C．got married, have been married | D．have got married, were married |
—Have you finished your homework ________?
--Not ________. I was playing computer games.
| A．yet ,already | B．already ,yet | C．yet, yet | D．yet, yet |